? NRCAN/C860 Approved ? Solid State Transfer and battery charger ? CSA C22.2 No. 141Certified ? 20 Gauge Steel Construction ? Meets ENERGY STAR specs. ? Universal mounting canopy for top or side installation ? 120/347 VAC Input, field selectable ? Slide out faceplates and backplates for simple and quick installation ? High-performance, sealed Ni-Cad battery (Self-Powered) ? Snap out directional chevrons/arrows ? 90 Minute emergency duration std. on Self-Powered with 120 minutes optional ? Emergency DC Backup Voltage 6, 12 or 24 VDC selectable ? 18 1/2" L x 7 1/2" H x 2 1/4" D